‘mat-label’ is not a known element Error in latest Angular Material

If you have multiple modules make sure you’re importing the MatFormFieldModule in every module. It’s not sufficient to just import it in the root module.

For example, I have a CommonWidgetsModule which contains some common widgets (my own) and you’ll see I’m importing MatFormFieldModule and MatInputModule

// common-widgets.module.ts
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';

@NgModule({
  imports: [
    CommonModule,
    SharedModule,
    RouterModule,

    MatFormFieldModule,
    MatInputModule,

    // import other MatModules...

  ],
  declarations: DECLARATIONS,
  exports: DECLARATIONS
})
export class CommonWidgetsModule { }